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VulnerabilityPublished Updated

CVE-2026-6245: Red Hat Enterprise Linux 10 · Buffer Access with Incorrect Length Value

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 5.5 Medium.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10sssdAffected–Fixed in–
Red Hat Enterprise Linux 6sssdAffected–Fixed in–
Red Hat Enterprise Linux 7sssdAffected–Fixed in–
Red Hat Enterprise Linux 8sssdAffected–Fixed in–
Red Hat Enterprise Linux 9sssdAffected–Fixed in–
Red Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-8Affected–Fixed in–

AI-suggested

Until an official fix is available, consider restricting local access to systems running Red Hat Enterprise Linux 10 and monitor for unusual authentication failures related to SSSD. No vendor advisory content explicitly states that no action is required or that the issue is already mitigated.

Description

A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).

References

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